CA2088083A1 - Method for selectively controlling the propagation of dual tone multi-frequency signals within a telecommunication network - Google Patents

Method for selectively controlling the propagation of dual tone multi-frequency signals within a telecommunication network

Info

Publication number
CA2088083A1
CA2088083A1 CA2088083A CA2088083A CA2088083A1 CA 2088083 A1 CA2088083 A1 CA 2088083A1 CA 2088083 A CA2088083 A CA 2088083A CA 2088083 A CA2088083 A CA 2088083A CA 2088083 A1 CA2088083 A1 CA 2088083A1
Authority
CA
Canada
Prior art keywords
propagation
dtmf
network
triggers
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2088083A
Other languages
French (fr)
Other versions
CA2088083C (en
Inventor
Dario Livio Parola
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Dario Livio Parola
American Telephone And Telegraph Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dario Livio Parola, American Telephone And Telegraph Company filed Critical Dario Livio Parola
Publication of CA2088083A1 publication Critical patent/CA2088083A1/en
Application granted granted Critical
Publication of CA2088083C publication Critical patent/CA2088083C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

A method for monitoring a network communications channel to detect specific DTMF triggers transmitted by a network user during either a pre-answer or a post-answer period of a call supported by the channel, and, in response to the detected DTMF triggers, controllably prohibiting the propagation of subsequent DTMF signals transmitted over the channel by the network user. Specifically, possible disruption of a communication between the network user and other parties caused by transmission of DTMF signals is eliminated by advantageously transmitting the DTMF triggers during the pre-answer period of a call. Furthermore, another deficiency of prior network-based arrangements for restricting the propagation of DTMF signals is overcome, as the invention may be practiced without the introduction of any significant propagation delay to a network.
CA002088083A 1992-04-30 1993-01-26 Method for selectively controlling the propagation of dual tone multi-frequency signals within a telecommunication network Expired - Fee Related CA2088083C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/876,555 US5327492A (en) 1992-04-30 1992-04-30 Method for selectively controlling the propagation of dual-tone multi-frequency signals within a telecommunications network
US876,555 1992-04-30

Publications (2)

Publication Number Publication Date
CA2088083A1 true CA2088083A1 (en) 1993-10-31
CA2088083C CA2088083C (en) 1996-10-01

Family

ID=25368002

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002088083A Expired - Fee Related CA2088083C (en) 1992-04-30 1993-01-26 Method for selectively controlling the propagation of dual tone multi-frequency signals within a telecommunication network

Country Status (6)

Country Link
US (1) US5327492A (en)
EP (1) EP0568240B1 (en)
JP (1) JP2758121B2 (en)
CA (1) CA2088083C (en)
DE (1) DE69317807T2 (en)
ES (1) ES2116410T3 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5459781A (en) * 1994-01-12 1995-10-17 Dialogic Corporation Selectively activated dual tone multi-frequency detector
US5638436A (en) * 1994-01-12 1997-06-10 Dialogic Corporation Voice detection
JP3550737B2 (en) * 1994-07-08 2004-08-04 富士ゼロックス株式会社 Communication device
US5604793A (en) * 1995-08-03 1997-02-18 Dialogic Corporation Tone blocking using variable delay buffer
US6493441B1 (en) * 1996-09-27 2002-12-10 Siemens Information And Communication Networks, Inc. Method of controlling telecommunications signalling
KR100258129B1 (en) * 1998-03-17 2000-06-01 서평원 AT cell conversion device including tone and DFM generation function
US6700963B1 (en) 1998-04-08 2004-03-02 Worldcom, Inc. System and method therefor of preventing fraud on pay phone credit/debit calling card authorization
US6327354B1 (en) * 1999-08-17 2001-12-04 Ameritech Corporation Methods, systems, and articles for providing a family telecommunication service
GB2363036B (en) * 2000-05-31 2004-05-12 Nokia Mobile Phones Ltd Conference call method and apparatus therefor
US7653190B1 (en) * 2000-08-31 2010-01-26 At&T Knowledge Ventures, L.P. Methods, system and article for providing a family telecommunication service using an originating dual-tone multi-frequency trigger
US8675849B2 (en) * 2005-02-09 2014-03-18 Cisco Technology, Inc. Ubiquitous transfer of a phone number to another phone
US8139729B2 (en) 2005-04-27 2012-03-20 Verizon Business Global Llc Systems and methods for handling calls associated with an interactive voice response application
JP4725955B2 (en) * 2005-06-30 2011-07-13 株式会社リコー Information processing apparatus, message management method, program, and storage medium
US7881447B1 (en) * 2005-07-19 2011-02-01 Sprint Communications Company L.P. Conference call text messaging protocol using caller ID screen
GB0808448D0 (en) 2008-05-09 2008-06-18 Elync Ltd Secure communication system and method of operating the same
EP2501162B1 (en) * 2009-11-11 2017-04-26 Huawei Technologies Co., Ltd. Method, device and system for processing downlink signal
JP6275210B2 (en) * 2016-07-28 2018-02-07 株式会社Ｎｔｔドコモ Call control apparatus and communication system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219699A (en) * 1978-10-13 1980-08-26 Wescom, Inc. Telephone supervision system using DTMF signals
US4629836A (en) * 1984-08-29 1986-12-16 Tii Computer Systems, Inc. Method and apparatus for accessing communication systems
US4626628A (en) * 1984-09-27 1986-12-02 Northern Telecom Limited Telephone line circuit having time-shared DTMF receivers
US4621354A (en) * 1984-12-21 1986-11-04 Gte Communication Systems Corporation DTMF receiver sense and control maintenance arrangement
CA1268570A (en) * 1987-08-14 1990-05-01 Melvin J. Roberts Telephone tone detector
US4866762A (en) * 1988-04-04 1989-09-12 Pintar Robert R Apparatus for restricting telephone calls
US5109220A (en) * 1989-03-15 1992-04-28 Motorola, Inc. Selective call controller
JPH0773298B2 (en) * 1989-09-14 1995-08-02 富士通株式会社 Power input control device for ISDN terminal

Also Published As

Publication number Publication date
US5327492A (en) 1994-07-05
DE69317807D1 (en) 1998-05-14
JPH0654059A (en) 1994-02-25
CA2088083C (en) 1996-10-01
JP2758121B2 (en) 1998-05-28
EP0568240A1 (en) 1993-11-03
DE69317807T2 (en) 1998-08-13
ES2116410T3 (en) 1998-07-16
EP0568240B1 (en) 1998-04-08

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed